The answers to the clues below will have something in common.

1. "Go skydiving" may be on one
2. Goofing around, silly behavior
3. Mosquito breeding ground
4. It's known as "Insurance City"
5. You need one to get on a plane
6. Heavy duty leveler
7. Tumble-down

Answers:

1. Bucket list
2. Tom foolery
3. Stagnant water
4. Hartford, Connecticut 
5. Boarding pass
6. Bulldozer
7. Ramshackle

What the answers have in common:

Each answer contains the name of a male animal:

1. Buck
2. Tom
3. Stag
4. Hart
5. Boar
6. Bull
7. Ram

Credit: NY Times Crossword
Nancy Salomon
MALE BONDING